Suppression of Populations of Native Pink Bollworm in Field Cages by the Release of Irradiated Moths

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Native populations of Pectinophora gossypiella (Saunders) in 7.3×3.7×1.8-m field cages were suppressed by continuous releases of moths of a laboratory strain irradiated as adults with 10 krad. Cages receiving moths irradiated with 20 krad had populations not significantly different from those in control cages. The 1st generation of native moths increased 4–5 fold in all cages. In the 2nd generation, which developed in bolls, the control cages increased by a 36-fold rate vs. a 15-fold rate for cages receiving moths irradiated with either 10 or 20 krad. Results indicated that moths irradiated with 10 krad were more effective in suppressing native populations than moths irradiated with 20 krad.

Document Type: Research Article

Publication date: February 1, 1974

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